Installation manual 2N® IP Audio Kit
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Connection of External Microphone
2N
®
IP
Audio Kit
is
equipped with an input for connection of an external electret microphone on
the MIC+ and MIC-
terminals. Shielding
of the shielded cable is connected to the IN- terminal.
•
•
•
Caution
Never connect a loudspeaker with impedance lower than 4
Ω
to avoid system
damage.
Never exceed the maximum power output designated for the loudspeaker to avoid
loudspeaker destruction. Choose a loudspeaker with proper impedance and
maximum power values, or limit the maximum volume level in the device
configuration.
Use an external power supply to maximise the power output. Make sure that the
maximum Master volume value is +6 dB in the Hardware / Audio menu if you use
PoE and 4
Ω
speaker.
•
•
Caution
Undesired noise may be heard in the earphone where EMI affects the microphone
signal. To avoid this, connect the microphone using a shielded cable of the
minimum possible length.
If you use a one-conductor shielded wire, interconnect the MIC− and IN− terminals.
